Business Segments - Schedule of Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total operating revenues	$ 19,384.0	$ 20,244.3	$ 21,529.4
Store and other operating expenses	1,108.5	1,064.6	1,014.8
Selling, general and administrative	231.5	235.4	240.5
Depreciation and amortization	276.8	248.0	228.7
Restructuring expense	12.6	0.0	0.0
Interest expense	110.9	97.1	98.5
Investment (income) loss	(0.2)	(6.4)	(6.9)
Other nonoperating income (expense)	(1.4)	0.6	0.0
Income (loss) before income taxes	609.2	651.6	734.4
Corporate and Other Assets
Segment Reporting Information [Line Items]
Total operating revenues	0.5	0.6	0.5
Depreciation and amortization	26.0	18.2	16.8
Restructuring expense	12.6	0.0	0.0
Interest expense	102.9	88.7	89.6
Other (revenues)	(0.5)	(0.6)	(0.5)
Other operating expenses	0.2	0.2	0.2
Gain (loss) on sale of assets	0.3	(0.1)	0.1
Investment (income) loss	(0.2)	(6.4)	(6.9)
Other nonoperating income (expense)	(1.4)	0.6	0.2
Operating segments | Marketing
Segment Reporting Information [Line Items]
Total operating revenues	19,383.5	20,243.7	21,528.9
Cost of goods sold	17,024.6	17,937.5	19,215.6
Store and other operating expenses	1,108.3	1,064.4	1,014.6
Selling, general and administrative	231.5	235.4	240.5
Depreciation and amortization	250.8	229.8	211.9
Other segment items	11.2	16.0	3.5
Interest expense	8.0	8.4	8.9
Income (loss) before income taxes	$ 749.1	$ 752.2	$ 833.9